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Topic: Enterprise JavaBeans, Best Practices

EJB Observer Pattern

This article explains how to implement the observer pattern in a suite of integrated EJB apps. The suite has a shared repository and each EJB application has it own repository. Every application in the suite runs on a separate host. Each application needs to observe changes in the shared repository as they occur -- and within the transaction in which they occur. If a proposed change to the shared data is unacceptable to any given application then the transaction must be aborted before the change is made permanent.



Updated: 03/17/2001
Organization: theserverside.com